Steyr 91 series heavy duty truck air filter maintenance guide

Steyr 91 series heavy-duty truck engine adopts a dry air filter. Hyundai increased use of paper air filter, high efficiency air filter paper, Auto Diagnostic Tool test data shows that only 0.1% to 0.3% transmittance of dust. Use paper air filter can reduce wear of the cylinder and piston, extending engine life. Should be used with care and attention to the following points:

(1) Master the characteristics of wd615 engine paper filter and cleaning method
This air filter, the outer filter element is treated with microporous filter paper, and the surface is treated by resin.. In the engine operation, the air filter through the microporous filter to the dust, ensure clean air into the turbocharger and then into the cylinder. Senior internal filter made of felt, a safety cartridge. In use, the filter will pick up around the outer layer of dust. Clean the air filter outside filter, not used water, oil, should prevent oil dip filter; commonly used method is to gently pat. Specifically: gently tap on the tire, beat the dust out, and then dried 0.4mpa the following air purge. When the purge should be blown inside out.

(2) Regular cleaning and replacement of filters
In Steyr 91 series of heavy-duty vehicles so that there shall maintain provisions for periodic air filter cleaning and replacement, in order to avoid excessive dust adhered to the filter, causing the intake resistance increases, reducing engine power and increased fuel consumption. Cars with 2000 ~ 4000km, air filter (inside and outside) clean, replace the filter at the outer 12000km, Launch X-431 PAD or Launch X431 Diagun III tool checks show that: in the best six months to replace the filter. If the filter is damaged should be replaced promptly.

(3) Installed correctly
In the inspection and maintenance of air filters, the seal on the filter pad must be installed well. Rubber gaskets easy to aging and deformation, the air is easy to flow through the gap from the seal, the dust into the cylinder. If the gasket aging, the best replacement of the air filter. External filter meshes such as rupture or the upper and lower end caps glued joints cracked should be replaced.

Dry air filter is passed through a dry filter, such as paper filter, the air impurities in the filter. Light vehicles (including cars, mini-cars) is generally used as a single-stage air filter. Its oval or elliptical shape and flatbed. The filter material is filter paper or nonwoven fabric. Filter cover with metal or polyurethane, the shell material is a metal or plastic. At rated air volume flow, original filtration efficiency filter should not be less than 99.5%.

Heavy duty vehicle due to poor working conditions, it must be more than one air filter. The first stage cyclone pre-filter (such as a blade ring, swirl tubes, etc.), used to filter impurities coarse particles, filtration efficiency above 80%, the second stage fine filter is a porous paper filter (commonly referred to as primary filter), the filtration efficiency of 99.5%. after the main filter element and a security filter, its role is in the installation and replacement of the main filter element, or in the main filter accidental damage, to prevent dust from entering the engine, you can regularly for the use of Xtool PS2 or Autel Maxidiag Elite MD703 tools to check the engine performance, the core material more secure non-woven fabric, but also the use of filter paper.
Source: http://www.focalobd.com/blog/steyr-91-series-heavy-duty-truck-air-filter-maintenance-guide/

Common method for cleaning automotive fuel injector

After vehicle driving for a long time, the fuel injector outlet is usually bonded with some carbon deposits, gum grease and other debris, will lead to fuel injection nozzle fuel reduction, affect vehicle acceleration performance, but also a serious engine can not be normal operation. Therefore, in daily vehicle maintenance, require frequent use of Auto Diagnostic tool check the car performance, especially in the automotive fuel injectors need to check.

Fuel injector cleaning is usually lorry wash and ultrasonic cleaning both methods, along with the car cleaning to use special EFI car wash liquid, Its advantage is not need to be removed from the car fuel injector, and the operation is convenient; drawback is cannot directly observe the working state of the fuel injector, and the effect is not ideal.

Ultrasonic cleaning is the injector removed from the engine installed on the ultrasonic cleaning tank cleaning, Its advantage is high cleaning quality, still can put fuel injector to injector test bench for fuel injection quantity, leakage and Spray testing situation; the disadvantage is expensive equipment.

We can choose with the carburetor cleaner cleaning injection device. Optional qualified carburetor cleaner, spray evenly on the injector, the effective removal of grease and soot and other plastic material, after the cleaning is done, you can use Launch X431 Creader VI+ or Launch Creader V+ tools check the injector working conditions.

The specific method is:
a, Remove the injector from the engine;
b, dedicated connector carburetor cleaner tank and injectors;
c, The carburetor cleaning agent is sprayed into the injector, check the amount of leakage in the injector is not energized condition;
d, intermittently energizing the solenoid injector, let carburetor cleaning agent injector spray atomization while observing their situation.

There are many types of cleaning agent now, generally in the bottle are indicated, so owners need to look carefully at the time of purchase to understand the characteristics of the cleaning agent, do not buy low-quality cleaning agents, to avoid unnecessary losses, you can use Autel Maxidiag Elite MD703 or Autel Maxidiag Elite MD702 Tools check the injector, it will prompt the purchase of which a cleansing agent.
Source: http://www.focalobd.com/blog/common-method-for-cleaning-automotive-fuel-injector/

Choose automobile ABS brake fluid matters needing attention

ABS is the installation of the modern car regular device, its function is becoming more and more attention. Because of the ABS system is more complicated than conventional braking system, you can use the Auto Diagnostic Tool to check the ABS system routine performance, therefore when choosing, replacement and supplement the brake fluid should pay special attention to:

The brake fluid correct selection:
1, in the ABS system, there is more rubber seals and rubber hoses, this requires the owner in the use of the brake fluid can't have strong swelling effects on rubber seals.

2, in the ABS system, there are more and more sophisticated metal parts and therefore requires the choice of brake fluid has good corrosion resistance, so as to avoid metal parts from corrosion.

3, in the ABS system, there is a longer, more complicated pipeline, therefore, requires the choice of brake fluid has a high boiling point, in order to avoid the brake fluid vaporize that braking system to produce air resistance, you can use Launch X431 CResetter II or Launch X431 Diagun III tool to check the brake system is working properly.

4, in the ABS system, the brake fluid through repeated pressure increase and decrease the circulation, therefore, the work of the brake fluid temperature and pressure is higher than conventional braking system of brake fluid, which requires the brake fluid has better oxidation resistance, in order to avoid brake fluid in formation colloid, sediment and corrosive substances.

5, the ABS system, brake fluid pathway is longer and more tortuous, resulting in brake fluid in flow process by the greater resistance; in addition, in the ABS system, moving parts more, more sophisticated, these moving parts of lubrication requirements higher. Therefore, ABS system, the choice of brake fluid must possess proper viscosity.

According to the above characteristics, ABS systems generally use brake fluid DOT4, Although DOT5 brake fluid has a higher boiling point, but because DOT5 is a silicon brake fluid, will strong damage to the rubber parts. Therefore, In the ABS system, generally do not use the brake fluid DOT5.

However, due to DOT3 and DOT4 brake fluid is alcohol-based, with strong moisture absorption, with the use of extension of time in which the water content will increase. When the brake fluid contains more moisture, will make dynamic pressure regulation means precision parts corrosion occurs, in cold weather conditions, but also the viscosity of the brake fluid increases, affecting the flow of the brake fluid in the brake system, the brake becomes slow, resulting in system moving distance is extended.

In addition, the brake fluid in the water will have a very significant impact on the boiling point of the brake fluid, gas resistance. DOT3 and DOT4 brake fluid usually after 12 months of use after which the moisture content of 2%, after after 18 months of use, where the moisture content of up to 3%, you can use the Autel Maxidiag Elite MD703 or Autel MaxiDiag FR704 tool to check the brake fluid water content, therefore, suggest you every 12 months to replace a brake fluid.
Source: http://www.focalobd.com/blog/choose-automobile-abs-brake-fluid-matters-needing-attention/

How to correctly use car navigation systems

Now many owners like to put a navigator in the car, which is equivalent to a portable electronic maps, navigation systems owners can use common sense to operate, or operate in accordance with the product instructions, and sometimes you can use Auto Diagnostic Tool, so you can save a lot of time, take a look at the correct way of using the navigator.

1. We do not recommend put the navigator on the dashboard, especially in the summer, the sun direct lighting causes navigator damage.

2. Buy a new navigator first charge at least 10 hours.

3. to start the car, after inserting the cigarette lighter power, after the end of the navigation unplug the cigarette lighter, and then plug the next start vehicle, which will help protect the machine battery, extending battery life, you can use the Launch X431 Creader VIII or Launch X431 CResetter II tools to detect cars performance.

4. Beside the navigator don't put the sharp things, so as not to damage the navigation screen.

5. After the shutdown sequence to follow this: Close the page, and then shut down, and finally unplug it, some owners diagram easy, used directly pull the plug, never shut down, this is easy, but a long time is easy to damage Electronic components.

General method enabled car navigation systems. Push in the SD memory card, do not write-protected SD card to the front toward the front of its host, the SD memory card gently into the jack switch to [OFF] in advance of Location So, when the first time, please switch to the position [ON], and enter the main interface, you can then start using the car navigation system; a delay when the screen can not be switched, the button does not work or touch Tap the pen system does not respond, press the [RESET] holes button to reset the system, can also be used Autel Maxidiag Elite MD701 or Autel Maxidiag Elite MD703 tools to reset.
Source: http://www.focalobd.com/blog/how-to-correctly-use-car-navigation-systems/

How to prevent automobile carbon deposition

Carbon deposition is spark discharge machining a manifestation of abnormal, therefore, should try to reduce vehicle carbon deposition by some Auto Diagnostic Tool.

First, Don't long time idle running.
Long idling time, the engine reaches normal temperature time becomes longer, the gasoline is injected into the valve back after the evaporation speed is slow, carbon also arises. At the same time often idling speed, air flow into the engine also small, so flushing carbon deposition action becomes very weak, will promote the accumulation of carbon deposition. You can use the Launch X431 GDS 3G or Launch X431 Diagun III tool to detection of carbon deposition.

Second, high-speed running, try to improve my hand car shift speed.
Run high-speed purpose is use air flow on the inlet to prevent carbon deposition. In addition, to improve the speed of the shift also run a high speed have the same role, in the original 2000 speed when shifting into 2500 conversion, not only can effectively prevent coke formation, it can also increase the power of the car, but also to avoid the change burst speed is too low to bring vibration block, protect the engine.

Third, pay attention to turn off car.
For cars fitted with a turbocharger, don't stop immediately after high speed or climbing, in idle running 10 minutes and then stop, because the car is equipped with a turbocharger which carbon formation rate than the average naturally aspirated car several times faster, you can use Autel MaxiDiag Elite MD802 or Autel Maxidiag Elite MD703 tools to detect the car's performance.
Source: http://www.focalobd.com/blog/how-to-prevent-automobile-carbon-deposition/

Summer car air conditioning maintenance tips

Summer use car, certainly can not do without air conditioning. Then the use of car air-conditioning, the owners should pay attention to what? Today we'll explore the automotive air conditioning problem, of course, also need to prepare OBD diagnostic tool.

Clean the condenser
Air-conditioning system in use for some time, the surface of the condenser will be coated with some foreign body, these foreign bodies blocking the air filter, or floating on the surface of the condenser, which will affect the cooling effect of air conditioning, air conditioning will produce odor, adverse effects on the human body . Should go to the auto repair shop for an inspection of the vehicle air conditioning system, generally they will use Launch X431 IV GX4 Master or Launch X-431 PAD tool to clean the condenser surface of the foreign body, if necessary replace the air filter, in order to maintain a good environment for air conditioning running.

Lack of refrigerant
Lack of air conditioning refrigerant is the main cause of air conditioning refrigeration effect is not good. In normal circumstances, the refrigerant is not reduced, and the main reason is the refrigerant that leaked. Therefore, when check the air conditioning system, to each line carefully check joint, found to have leaked refrigerant situation due to the timely change of relevant components. May require the repair shop at the same time add refrigerant added significantly colored dye, so that when you can easily found leak and timely treatment.

Sterilization
Air conditioning system has numerous piping, duct, these ducts in daily use due to temperature changes, moisture will produce internal hard to avoid. In addition, as the microbes in the air will be left in the air conditioning duct. It's all fueled the growth of bacteria, the bacteria will breed conditioning system odors, serious harm to the health of vehicle occupants. Therefore, regular air-conditioning system for disinfection is still necessary.

Air conditioning additives
The air conditioning compressor additives can increase the compressor, reduce noise, reduce friction, and air conditioning work together to improve the efficiency and extend the life of air conditioning effect. In the auto supply store to buy air conditioning system additive package, the owner can own maintenance on the air conditioning system, the main tool is Autel Maxidiag Elite MD701 or Autel Maxidiag Elite MD703. The main effect of conditioning additives are:

1. Can improve the cooling effect, low air temperature 2-5 ℃.
2. Reduce friction compressor and prolong life.
3. Reduce the air conditioning compressor noise.
4. The fuel savings of about 10%.
Source: http://www.focalobd.com/blog/summer-car-air-conditioning-maintenance-tips/